I haven’t paid attention to the Kindle until now, so I don’t know if this has been going on for some time or is a new development.
I know Aldiko has been included on both the Camangi Workstation and the Archos 7 Home Tablet.
Bundling an eBook application like that is very smart — particularly so for Amazon. Just seeing that icon on the home screen, a prospective customer is bound to notice and think, “Ooh, look! I don’t have to buy a Kindle now!”